Tanner Roark is 7-0 with a 1.08 ERA for the Nationals

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As the Nationals’ cling to their playoff lives with a dramatic late-season run an unheralded 26-year-old rookie is piling up victories.

Tanner Roark, a former 25th-round pick acquired from the Rangers for Cristian Guzman in mid-2010 who didn’t make his big-league debut until last month, tossed seven shutout innings against the Braves last night to improve to 7-0 with a 1.08 ERA for the Nationals.

To record seven wins in less than two months is pretty remarkable, especially considering Roark was in the bullpen for most of that time. He went 4-0 with a 1.19 ERA in nine relief appearances totaling 23 innings and then moved into the rotation at the beginning of this month, going 3-0 with a 0.95 ERA in three starts totaling 19 innings.

Obviously he’ll come back down to earth eventually, but Roark’s raw stuff has also been very impressive with an average fastball velocity of 92.6 miles per hour and a mid-80s slider that has been nearly unhittable. And yet before turning into a cross between Pedro Martinez and Mariano Rivera for the Nationals he posted a 3.87 ERA at Triple-A and a 4.21 ERA at Triple-A.

Baseball, you try to explain it.

Yankees acquire James Paxton from Mariners

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The Yankees announced that the club has acquired starter James Paxton from the Mariners in exchange for three prospects: pitcher Justus Sheffield, outfielder Dom Thompson-Williams, and pitcher Erik Swanson.

Paxton, 30, has been among the game’s better starters over the past few years. In 2018, he went 11-6 with a 3.76 ERA and a 208/42 K/BB ratio in 160 1/3 innings. The lefty has two more years of arbitration eligibility remaining after earning $4.9 million this past season.

Sheffield, 22, is the headliner in the Mariners’ return. He made his major league debut in September for the Yankees, pitching 2 2/3 innings across three appearances. Two of those appearances were scoreless; in the third, he gave up a three-run home run to J.D. Martinez, certainly not an uncommon result among pitchers. MLB Pipeline rates Sheffield as the Yankees’ No. 1 prospect and No. 31 overall in baseball.

Thompson-Williams, 23, was selected by the Yankees in the fifth round of the 2016 draft. This past season, between Single-A Charleston and High-A Tampa, he hit .299/.363/.546 with 22 home runs, 74 RBI, 63 runs scored, and 20 stolen bases in 415 plate appearances. He was not among the Yankees’ top-30 prospects, per MLB Pipeline.

Swanson, 25, was selected by the Yankees in the eighth round of the 2014 draft. He spent most of his 2018 campaign between Double-A Trenton and Triple-A Scranton/Wilkes-Barre. Overall, he posted a 2.66 ERA with a 139/29 K/BB ratio in 121 2/3 innings. MLB Pipeline rated him No. 22 in the Yankees’ system.

This trade comes as no surprise as the Yankees clearly wanted to upgrade the starting rotation and the Mariners seemed motivated to trade Paxton this offseason. To the Mariners’ credit, they got a solid return for Paxton, as Sheffield likely becomes the organization’s No. 1 prospect. The only worries about this trade for the Yankees is how Paxton will fare in the more hitter-friendly confines of Yankee Stadium compared to the spacious Safeco Field, and Paxton’s durability. Paxton has made more than 20 starts in a season just twice in his career — the last two years (24 and 28). The Yankees are likely not done adding, however. Expect even more new faces before the start of spring training.